Thin display device and plasma display

ABSTRACT

A flat-panel display unit is provided which includes: a PDP  10;  an aluminum chassis  2  that is attached to the PDP  10;  an upper data driver substrate  6  and a signal processing substrate  7  that are attached to the aluminum chassis  2;  and a flexible cable  8  that connects the substrates  6, 7  electrically. Between the substrates  6, 7,  a pressing plate  9  fixes at least one part of the flexible cable  8,  so that the space between the flexible cable  8  and the aluminum chassis  2  remains unchanged. Thereby, a stray capacitor can be stably formed using the insulating material of the flexible cable  8,  and a high-frequency noise can be effectively reduced.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a flat-panel display unit, such as aplasma display and a liquid-crystal display.

2. Description of the Related Art

Inside of the frame body of electronic equipment, a signal-transmissioncable is used through which a signal is transmitted between circuitsubstrates. As such a cable, in recent years, a thin sheet-type flexiblecable (which is generally called an FFC (or flexible flat cable) or anFPC (or flexible printed circuit)) has been more popular, as electronicequipment becomes smaller and denser. In such a flexible cable, itsconnecter is smaller than that of any other conventional flat cable.Thereby, the area necessary for mounting a cable on a circuit substratebecomes smaller. Besides, the flexible cable is thinner and moreflexible, so that its degree of freedom is greater. For those and othersuch reasons, it has been used.

On the other hand, as a signal is transmitted faster (with a higherfrequency), the problem of an electro-magnetic wave noise has becomeapparent which is radiated from a cable through which a signal istransmitted between circuit substrates inside of electronic equipment.In order to restrain the emission of such an electro-magnetic wavenoise, for example, Japanese Patent Laid-Open No. 2002-117726specification discloses a case where a thin sheet-type flexible cable issubjected to shielding. FIG. 8 schematically shows the configuration ofa shielded flexible cable 108.

In this flexible cable 108, a sheet-shaped shield conductor 102 and asheet-shaped insulator 101 are formed in layers. This whole stratifiedbody is covered with an insulating coat 107. Inside of the insulator101, several conductive wires are provided in parallel. These conductivewires are a high-speed signal line 103 such as a clock signal line, alow-speed signal line 106 such as a ground line 104, a shield groundline (or a shield drain line) 105, a control signal line, and the like.The shield ground line 105 is used to connect the shield conductor 102to the ground of a circuit substrate to which the flexible cable isconnected. It is connected to the shield conductor 102. The ground line104 is not connected to the shield conductor 102 and is separate. Inthis flexible cable 108, the high-speed signal line 103 and the shieldground line 105 are adjacently disposed for the purpose of shielding.Herein, in addition to those lines, a power-source line and other signallines are provided in the flexible cable 108. However, in the figure,they are omitted, and thus, only conductive wires are shown which arerelated to the following conventional disadvantages.

In the above described flexible cable 108 which is subjected toshielding, the shield conductor 102 and the shield ground line 105contribute to keeping down an electro-magnetic wave noise. However, itis required to have a multi-layer structure, and thus, it becomes anextremely expensive flexible cable. Besides, as shown in FIG. 4A, if aflexible cable 11 connects substrates, some play is given. Therefore, asshown in FIG. 4A, the flexible cable 11 is disposed so as to bulge out.

However, if a flexible cable is used, for example, to connect substrateswhich are attached to an aluminum chassis 2 inside of a plasma display,then the aluminum chassis 2 is connected to a drive-system ground, asignal-system ground and a frame body. This generates a straycapacitance between the flexible cable 11 and the aluminum chassis 2.Therefore, when the flexible cable 11 is connected with such play, somedispersion can be produced in the bulge shown in FIG. 4A, thusdispersing the stray capacitance. In addition, a flexible cable isflexible and its shape is easily changed. Hence, as the shape ischanged, the stray capacitance is also changed. In this case, the morelargely the flexible cable 11 bulges out so as to go away from thealuminum chassis 2, the less the stray capacitance becomes. Thereby, thehigher-harmonic component of a signal inside of the flexible cable 11 isdifficult to drain to a ground. This prompts a high-frequency componentto radiate from the flexible cable 11.

BRIEF SUMMARY OF THE INVENTION

In view of the above described conventional disadvantages, it is anobject of the present invention to provide a flat-panel display unitwhich is capable of effectively restraining an electro-magnetic wavenoise which is generated by a cable such as a flexible cable, using asimple and inexpensive configuration.

In order to attain the above described object, a flat-panel display unitaccording to the present invention, comprising a display panel, aconductive chassis attached to the display panel, a plurality ofsubstrates attached to the conductive chassis, and a cable electricallyconnecting the substrates, wherein a fixing member is provided whichfixes at least a part of the cable between the substrates.

In this flat-panel display unit, a stray capacitance is formed, using aninsulating material of a cable, between a signal line inside of thecable and the conductive chassis. Using the fixing member, the cable isfixed between substrates, thus keeping such a stray capacitance fromdispersing. This evades a situation in which the stray capacitancebecomes small so that a higher-harmonic component cannot be drained to aground. Hence, a stray capacitor is stably formed using the cable'sinsulating material, thereby effectively reducing a high-frequencynoise.

Furthermore, a flat-panel display unit according to the presentinvention, comprising a display panel, a conductive chassis attached tothe display panel, a substrate attached to the conductive chassis, and acable electrically connecting the display panel and the substrate,wherein a fixing member can also be provided which fixes at least a partof the cable between the display panel and the substrate.

Herein, if the fixing member is formed by a plate-shaped member whichholds the cable so that the cable is sandwiched between it and theconductive chassis, most of the cable can be placed along the conductivechassis. This helps increase a stray capacitance. As a result, via thestray capacitance, a high-frequency component can flow adequately, usingthe conductive chassis. Therefore, a high-frequency noise can be moreeffectively reduced. Besides, the plate-shaped member is designed to beonly placed on the cable. Hence, using an extremely simpleconfiguration, a high-frequency noise can be effectively reduced. Inaddition, the cable is sandwiched using the plate-shaped member, so thatno bulge is required. This helps narrow a wiring space, and thus, thinsuch a display unit.

Moreover, if the plate-shaped member is formed by a metal plate, thecable is sandwiched from both surfaces with metal, thereby doubling astray capacitance. Besides, this metal plate's shielding functioncontributes to further restraining a high-frequency noise from beingemitted.

In addition, if the metal plate is connected by means of a conductiveconnecting member to the conductive chassis, a high-frequency noisecomponent can be drained to a ground via this connecting member. Thishelps efficiently restrain a high-frequency noise from radiating.

In addition, the cable can be formed by a flexible cable. Herein, theflexible cable is flexible and its shape is easily changed, but it isfixed on the fixing member. Thereby, even if it bears an external forceafter being attached to the substrate, its shape cannot be easilychanged. Therefore, even in the case where the flexible cable is used, astray capacitance can be kept constant.

If the flexible cable is formed as a single-layer structure whichincludes only an insulating layer where a signal line is disposed, thena high-frequency noise can be kept from being emitted radiating andcosts can be lowered.

It is preferable that the conductive chassis be made of aluminum.

Furthermore, a plasma display according to the present invention,comprising a plasma display panel (hereinafter, referred to as the PDP),a conductive chassis attached to the PDP, a plurality of substratesattached to the conductive chassis, and a flexible cable electricallyconnecting the substrates, wherein a fixing member may also be providedwhich fixes at least a part of the flexible cable between thesubstrates.

Moreover, a plasma display according to the present invention,comprising a PDP, a conductive chassis attached to the PDP, a substrateattached to the conductive chassis, and a flexible cable electricallyconnecting the PDP and the substrate, wherein a fixing member may alsobe provided which fixes at least a part of the flexible cable betweenthe PDP and the substrate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a rear view of a plasma display according to a firstembodiment of the present invention, showing its external appearance.FIG. 1B is a sectional view of the plasma display, seen along a I-I lineof FIG. 1A.

FIG. 2 is a sectional view of an example of a flexible cable which isused in the plasma display.

FIG. 3A is a front view of a pressing plate according to the firstembodiment of the present invention. FIG. 3B is a side view of thispressing plate. FIG. 3C is a bottom view of this pressing plate.

FIG. 4A and FIG. 4B are each a rear view of a plasma display, comparinga conventional example and the first embodiment of the presentinvention. FIG. 4A corresponds to FIG. 1B in the conventional example.FIG. 4B corresponds to FIG. 1B in the first embodiment.

FIG. 5A is an illustration, showing a stray capacitance which is formedbetween a flexible cable and an aluminum chassis. FIG. 5B is anillustration, showing its equivalent circuit.

FIG. 6A is a sectional view of a pressing plate according to a secondembodiment of the present invention. FIG. 6B is a sectional view of thispressing plate which is connected to an aluminum chassis.

FIG. 7A is a sectional view of a pressing plate according to a thirdembodiment of the present invention which is connected to an aluminumchassis. FIG. 7B is a sectional view of the pressing plate, seen along aVII-VII line of FIG. 7A.

FIG. 8 is a sectional view of a shielded flexible cable.

DETAILED DESCRIPTION OF THE INVENTION

Best modes for implementing the present invention will be described withreference to drawings.

First Embodiment

As shown in FIGS. 1A and 1B, in a plasma display 1 according to a firstembodiment of the present invention, an aluminum chassis 2 is attachedto the rear side of a PDP 10. This aluminum chassis 2 is formed by analuminum die-casting. To this aluminum chassis 2, a plurality ofsubstrates are each attached at a predetermined position, such as asustain driver substrate 3, a scan driver substrate 4, a lower datadriver substrate 5, an upper data driver substrate 6 and a signalprocessing substrate 7. The signal processing substrate 7 is locatedsubstantially in the middle of the aluminum chassis 2. Below this signalprocessing substrate 7, the lower data driver substrate 5 is placed, andthe upper data driver substrate 6 is located above it. In FIG. 1A, thesustain driver substrate 3 and the scan driver substrate 4 are disposedon the right side and the left side of the signal processing substrate7, respectively.

The above described substrates 3, 4, are connected electrically. Forexample, as shown in FIG. 1A, the lower data driver substrate 5 and thesignal processing substrate 7 are electrically connected via a flexiblecable 8 a. The upper data driver substrate 6 and the signal processingsubstrate 7 are electrically connected via a flexible cable 8 b.Similarly, the scan driver substrate 4 and the signal processingsubstrate 7 are electrically connected via a flexible cable 8 c. Thesustain driver substrate 3 and the signal processing substrate 7 areelectrically connected via a flexible cable 8 d. The signal processingsubstrate 7 lies exactly in the middle between the lower data driversubstrate 5 and the upper data driver substrate 6. In short, theflexible cable 8 a and the flexible cable 8 b have substantially thesame length. This makes it easy to set timing.

Hereinafter, the flexible cable 8 b will be described which is used toconnect the upper data driver substrate 6 and the signal processingsubstrate 7. The other flexible cables which connect their predeterminedsubstrates are similar, and thus, their description is omitted. Herein,a connecter is provided at both ends of the flexible cable 8 b, thoughthey are not shown, for convenience, in FIGS. 1A and 1B. Such aconnecter is fitted to a connecter of each substrate 6, 7, so that theflexible cable 8 b is connected to the substrate 6, 7.

The flexible cable 8 b which connects the upper data driver substrate 6and the signal processing substrate 7 is formed, for example, as shownin FIG. 2, as a single-layer structure which has no shield layer.Specifically, this flexible cable 8 b includes a sheet-type insulator 20in which several signal lines 21, 22, 23, 24 are disposed in its widthdirections. It does not include such a shield conductor as shown in FIG.8. In other words, the flexible cable 8 b has no multi-layer structure.The insulator 20 is covered with an insulating coat 27. Herein, thisinsulating coat 27 may also be omitted. The above described signal linesare a high-speed signal line 21, a low-speed signal line 22, a shieldground line 23, a ground line 24 and the like. The other signal linesare not shown in the figure, for convenience. This flexible cable 8 bsends a signal, for example, at a transfer rate of 50 to 60 mbps.

The flexible cables 8 a, 8 b are fixed at their predetermined partsbetween the connecters, as shown in FIGS. 1A and 1B, by pressing plates9 a, 9 b, respectively. These pressing plates 9 a, 9 b are each anexample of a fixing member which fixes the flexible cable 8 a, 8 b onthe aluminum chassis 2. In this first embodiment, the pressing plates 9a, 9 b are formed by a metal plate. This metal plate is made of, forexample, rolled steel, stainless steel, aluminum, aluminum alloy,copper, copper alloy, or the like. Herein, the material of the pressingplates 9 a, 9 b is not limited to metal, and thus, it may also be resinor whatever.

As shown in FIGS. 3A to 3C, the pressing plates 9 a, 9 b include a pairof pressing portions 31, 31 and a connection portion 33 which connectsboth pressing portions 31, 31. Each pressing portion 31, 31 is a partwhich presses and holds the flexible cables 8 a, 8 b on the aluminumchassis 2. Each pressing portion 31, 31 has a long rectangularflat-plate shape, and they have the same shape. Each pressing portion31, 31 is placed to extend along the length directions of the flexiblecables 8 a, 8 b.

The pressing plates 9 a, 9 b may also fix the two flexible cables 8 a, 8b, using both pressing portions 31, 31. Or, a single flexible cable 8 a,8 b may also be fixed, using one pressing portion 31.

In addition, they are not limited to a form in which the two flexiblecables 8 a, 8 b can be fixed. A form where only a single flexible cable8 a, 8 b is fixed may also be used.

The connection portion 33 is formed to connect one long side of eachpressing portion 31, 31. In the other three sides of each pressingportion 31, 31, their ends are bent so that the flexible cables 8 a, 8 bwill not be damaged.

As shown in FIG. 3C, the connection portion 33 is bent into a shape likeprotruding from the pressing portions 31, 31. This shape enables eachpressing portion 31, 31 to press down the flexible cables 8 a, 8 b, eventhough the connection portion 33 comes into contact with a boss (notshown) which is provided to protrude in the aluminum chassis 2. Besides,in the connection portion 33, two connection holes 35, 35 are formed.Into each connection hole 35, 35, a screw (not shown) is inserted, andthen, it is fitted into the above described boss. Thereby, the pressingplates 9 a, 9 b can be fixed on the aluminum chassis 2. In other words,in this first embodiment, the two connection holes 35, 35 are formed inthe connection portion 33. Thus, at two places in the length directionsof the flexible cables 8 a, 8 b, the pressing plates 9 a, 9 b aredesigned to be fixed on the aluminum chassis 2. Herein, how to fix thepressing plates 9 a, 9 b is not limited to driving a screw. For example,they can also be fixed, using a connection by means of a rivet (notshown), staking, or the like.

The flexible cables 8 a, 8 b are sandwiched between the aluminum chassis2 and the pressing plates 9 a, 9 b. As a whole, they are attachedtightly to the aluminum chassis 2 and the pressing plates 9 a, 9 b.Herein, in this first embodiment, the aluminum chassis 2 is formed bydie-casting, and thus, its surface is rough. This may leave somecrevices between the aluminum chassis 2 and the flexible cables 8 a, 8b. The width of such a crevice is thought to be approximately 1 to 2 mmat its place. There is a case where a protruding rib (not shown) isprovided in the aluminum chassis 2 and the flexible cables 8 a, 8 b aredisposed to stride over this rib. In that case, such a rib also givesspace between the aluminum chassis 2 and the flexible cables 8 a, 8 b,and as a result, the space becomes 3 to 5 mm.

In this embodiment, as shown in FIG. 1 and FIG. 4B, the pressing plates9 a, 9 b can attach the flexible cables 8 a, 8 b closely to the aluminumchassis 2. Hence, compared with the conventional example shown in FIG.4A, a stray capacitance can be raised. Specifically, as shown in FIG.5A, let's consider a signal line 41 which is formed by, for example, acopper wire in the flexible cable 8 a(8 b). A capacitance C between thissignal line 41 and the aluminum chassis 2 can be expressed as a combinedcapacitance of a capacitance Ca of air and a capacitance Cf of aninsulating layer 43 which is formed by the insulator 20 and theinsulating coat 27. Herein, a relative dielectric constant ε a of air is1 and a relative dielectric constant ε f of the insulating layer is 4.3to 4.4. Taking this into account and an equivalent circuit shown in FIG.5B, the combined capacitance C can be expressed by the following.$C = {\frac{1}{\frac{1}{Ca} + \frac{1}{Cf}} = {\frac{{Cf} \cdot {Ca}}{{Cf} + {Ca}} = {\frac{Ca}{1 + \frac{Ca}{Cf}} \approx {{Ca}\quad\left( {{Cf}\operatorname{>>}\quad{C\quad a}} \right)}}}}$Therefore, in order to make a stray capacitance greater, it is desirablethat a crevice be made as narrow as possible. Preferably, the flexiblecable 8 a(8 b) should be attached tight to the aluminum chassis 2.Herein, as described earlier, even if there are several spaces of about1 to 5 mm between the aluminum chassis 2 and the pressing plate 9 a(9b), a stray capacitance can be secured to such a degree that ahigher-harmonic component could flow to a ground.

As described so far, in this first embodiment, the pressing plates 9 a,9 b fix the flexible cables 8 a, 8 b, respectively, so that the distancebetween the flexible cables 8 a, 8 b and the aluminum chassis 2 will notbe changed. This helps relatively keep a stray capacitance fromdispersing. In other words, in the conventional example shown in FIG.4A, the value of a stray capacitance depends upon how such a cablebulges. In contrast, in this first embodiment, the flexible cables 8 a,8 b are fixed by the pressing plates 9 a, 9 b, thereby stabilizing thevalue of a stray capacitance. Therefore, a situation can not be easilycaused in which the stray capacitance becomes less so that thehigher-harmonic component is difficult to drain to a ground. Hence, astray capacitor is stably formed, using the insulating material of theflexible cables 8 a, 8 b. This helps effectively reduce a high-frequencynoise.

Furthermore, the pressing plates 9 a, 9 b press the flexible cables 8 a,8 b onto the aluminum chassis 2, so that the flexible cables 8 a, 8 b goalong the aluminum chassis 2. This helps increase a stray capacitor.Therefore, via a stray capacitor, a high-frequency component can bedrained in larger quantities to the aluminum chassis 2 (i.e., aground).This helps reduce a high-frequency noise more efficiently.

Moreover, most of the flexible cables 8 a, 8 b between the substrates 5,6, 7 is sandwiched between the pressing plates 9 a, 9 b and the aluminumchassis 2. Therefore, in a great part across these substrates 5, 6, 7,the flexible cables 8 a, 8 b can be fixed so that the space between theflexible cables 8 a, 8 b and the aluminum chassis 2 remains unchanged.Consequently, the flexible cables 8 a, 8 b can be kept from changing thevalue of a stray capacitance. Herein, the range within which theflexible cables 8 a, 8 b are pressed down may be properly decided,taking a voltage into account.

In this first embodiment, the flexible cables 8 a, 8 b which are eachused to electrically connect each data driver substrate 5, 6 and thesignal processing substrate 7, 7 are fixed by the pressing plates 9 a, 9b, respectively. However, it is not limited to this configuration inwhich the cables 8 a, 8 b are fixed. Specifically, in the plasma display1, as described already, for example, a large number of substrates, suchas the sustain driver substrate 3 and the scan driver substrate 4, areattached to the aluminum chassis 2. Hence, at least apart of the cables8 c, 8 d which connect the substrates 3, 4, . . . can be designed to befixed by a pressing plate. Of course, all cables can also be fixed bypressing plates.

In addition, the present invention is not limited to a configuration inwhich the cables 8 a, 8 b, . . . which connect the substrates 3, 4, . .. are fixed. For example, a cable which electrically connects the PDP 10and a substrate can also be configured to be fixed at its certain partby a pressing plate. For example, FIG. 1 illustrates a configuration inwhich a flexible cables 8 e which electrically connects the PDP 10 andthe sustain driver substrate 3 is fixed at a part between the PDP 10 andthe sustain driver substrate 3 by a pressing plate 9 c.

Second Embodiment

In the above described first embodiment, the pressing plates 9 a, 9 bare connected to the flexible cables 8 a, 8 b, at two places in theirlength directions. However, in this second embodiment, as shown in FIGS.6A and 6B, such a connection is made at one place in the lengthdirections of a flexible cable 8. In this case, a pressing plate 9 mayalso be wider than the flexible cable 8, so that this pressing plate 9can be connected to both sides of the flexible cable 8. As shown in thefigure, a boss 47 with a screw hole 48 is pushed into the aluminumchassis 2. Then, a screw 50 for fixing the pressing plate 9 is fittedinto this boss 47. Thereby, the pressing plate 9 is fixed on thealuminum chassis 2.

As shown in FIG. 6A, in the case of the pressing plate 9 works as aspring, using its biasing force, it can press the flexible cable 8 moreeffectively. This pressing plate 9 may also be a metal plate, as long asit functions as a leaf spring. Besides, it may also be a non-metallicplate which is made of resin or the like.

Hence, the configuration in which the flexible cable 8 is fixed at oneplace in its length directions is suitable for a case where the aluminumchassis 2 is formed by not a die casting but a press plate so as to havea smooth surface, or another such case.

If the aluminum chassis 2 has a smooth surface, the flexible cable 8 canbe attached close to the surface of the aluminum chassis 2. Therefore,if the present invention is applied to in the case where the aluminumchassis 2 is formed by a press plate, that is extremely effective.

Herein, the other configurations, operation and advantages are the sameas those of the first embodiment.

Third Embodiment

A plasma display according to a third embodiment of the presentinvention will be described with reference to FIGS. 7A and 7B. In thosefigures, the aluminum chassis 2 and the flexible cable 8 are the same asthose of the first embodiment. Herein, the parts which are differentfrom those of the first embodiment are described. Hence, the samereference numerals are given to the same configurations as those of thefirst embodiment, and thus, their description is omitted.

In this third embodiment, a pressing plate 12 is electrically connectedto the aluminum chassis 2. The pressing plate 12 is, for example, analuminum plate. Besides, a boss 13 with a screw hole 16 is buried intothe aluminum chassis 2. Then, into this screw hole 16 of the boss 13, aconductive screw 14 is fitted which is inserted through a screwinsertion hole 18 of the pressing plate 12. As this screw 14, forexample, a steel material can be used which is subjected to metallicplating (e.g., nickel plating) with low conductivity. Therefore, thescrew 14 connects the pressing plate 12 and the boss 13, so that thepressing plate 12 can be electrically connected to the aluminum chassis2.

As described above, the pressing plate 12 fixes the flexible cable 8 sothat its shape could not be changed. In addition, this pressing plate 12is formed by a metal plate. Hence, the flexible cable 8 is surroundedwith this pressing plate 12 and the aluminum chassis 2. This helpsdouble a stray capacitance and effectively restrain a high-frequencynoise from radiating. Besides, the pressing plate 12 is electricallyconnected to the aluminum chassis 2. This means that both the aluminumchassis 2 and the pressing plate 12 are connected to a ground. As aresult, via the pressing plate 12, a high-frequency noise can beby-passed to a ground.

Therefore, the flexible cable 8 is attached tightly to the aluminumchassis 2, so that a high-frequency noise can be kept down. Furthermore,the metallic pressing plate 12 fixes the flexible cable 8, thusrealizing a shielding effect, using an inexpensive configuration.Moreover, such an increase in stray capacitance contributes to reducinga high-frequency noise further.

Herein, in this third embodiment, via the screw 14, the pressing plate12 is electrically connected to the aluminum chassis 2. However, thepresent invention is not limited to this. Thus, any other configurationsmay also be used, as long as conductivity can be obtained between thepressing plate 12 and the aluminum chassis 2.

This application is based on Japanese patent application serial No.2003-112355, filed in Japan Patent Office on Apr. 17, 2003, the contentsof which are hereby incorporated by reference.

Although the present invention has been fully described by way ofexample with reference to the accompanied drawings, it is to beunderstood that various changes and modifications will be apparent tothose skilled in the art. Therefore, unless otherwise such changes andmodifications depart from the scope of the present invention hereinafterdefined, they should be construed as being included therein.

INDUSTRIAL APPLICABILITY

The present invention can be used for a flat-panel display unit with aconductive chassis, such as a plasma display and a liquid-crystaldisplay.

1. A flat-panel display unit comprising; a display panel, a conductivechassis attached to the display panel, a plurality of substratesattached to the conductive chassis, and a cable electrically connectingthe substrates; wherein a fixing member is provided which fixes at leasta part of the cable between the substrates.
 2. A flat-panel display unitcomprising; a display panel, a conductive chassis attached to thedisplay panel, a substrate attached to the conductive chassis, and acable electrically connecting the display panel and the substrate;wherein a fixing member is provided which fixes at least a part of thecable between the display panel and the substrate.
 3. The flat-paneldisplay unit according to claim 1, wherein the fixing member is formedby a plate-shaped member which holds the cable so that the cable issandwiched between the plate-shaped member and the conductive chassis.4. The flat-panel display unit according to claim 3, wherein theplate-shaped member is formed by a metal plate.
 5. The flat-paneldisplay unit according to claim 4, wherein the metal plate is connectedby means of a conductive connecting member to the conductive chassis. 6.The flat-panel display unit according to claim 1, wherein the cable isformed by a flexible cable.
 7. The flat-panel display unit according toclaim 6, wherein the flexible cable is formed as a single-layerstructure.
 8. The flat-panel display unit according to claim 1, whereinthe conductive chassis is made of aluminum.
 9. A plasma displaycomprising; a plasma display panel, a conductive chassis attached to theplasma display panel, a plurality of substrates attached to theconductive chassis, and a flexible cable electrically connecting thesubstrates; wherein a fixing member is provided which fixes at least apart of the flexible cable between the substrates.
 10. A plasma displaycomprising; a plasma display panel, a conductive chassis attached to theplasma display panel, a substrate attached to the conductive chassis,and a flexible cable electrically connecting the plasma display paneland the substrate; wherein a fixing member is provided which fixes atleast a part of the flexible cable between the plasma display panel andthe substrate.
 11. The flat-panel display unit according to claim 2,wherein the fixing member is formed by a plate-shaped member which holdsthe cable so that the cable is sandwiched between the plate-shapedmember and the conductive chassis.
 12. The flat-panel display unitaccording to claim 11, wherein the plate-shaped member is formed by ametal plate.
 13. The flat-panel display unit according to claim 12,wherein the metal plate is connected by means of a conductive connectingmember to the conductive chassis.
 14. The flat-panel display unitaccording to claim 2, wherein the cable is formed by a flexible cable.15. The flat-panel display unit according to claim 14, wherein theflexible cable is formed as a single-layer structure.
 16. The flat-paneldisplay unit according to claim 2, wherein the conductive chassis ismade of aluminum.